Published: October 26, 2023 | Category: Data Tools & Drivers

If you work with large datasets, Excel files that exceed a million rows, or need to connect external applications (like Python, R, or SQL Server) to Microsoft Access databases, you have likely encountered the frustrating “Data Source Not Found” error. The solution?

If you are building a data pipeline, migrating legacy Access data to SQL, or simply trying to open a huge CSV in Excel via Power Query, download the 64-bit version today.

Get-ItemProperty "HKLM:\SOFTWARE\WOW6432Node\Microsoft\Office\16.0\Access Connectivity Engine\*" Yes. Despite newer versions existing (like the Access Runtime for Microsoft 365), the Microsoft Access Database Engine 2016 64-bit remains the industry standard for developers and data analysts. It is stable, lightweight, and does not require a Microsoft 365 subscription.

Always check your Office bitness first (File > Account > About Excel). Match your Database Engine to your Office version, or switch entirely to 64-bit Office for the best performance. Disclaimer: This article is for informational purposes. Ensure your software licensing permits the use of redistributable packages.

You have 32-bit Microsoft Office (installed by default by most companies). You try to install the 64-bit Access Database Engine. The installer fails with a cryptic error about "You cannot install a 64-bit version of the ACE provider because a 32-bit version is already present."